Elephants (new unit) vs artillery

So we all know that elephants are in the horizo, the question is how will arty work versus them ?

From a video that we can see from a french community tier 10 elephants are really tank and have 59 k hp and only one unit model. They work well versus archers but take decent damage from velites. So far i do not have any complains here. The big issue is arty, specially catapults.

I think that this is something we should test or at least get some info from WG and CA before those units are launched.